// Copyright 2023 Greptime Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

mod build;
mod database;
mod pg_catalog;
mod procedure_state;
mod timezone;
mod version;

use build::BuildFunction;
use database::{
    ConnectionIdFunction, CurrentSchemaFunction, DatabaseFunction, PgBackendPidFunction,
    ReadPreferenceFunction, SessionUserFunction,
};
use pg_catalog::PGCatalogFunction;
use procedure_state::ProcedureStateFunction;
use timezone::TimezoneFunction;
use version::VersionFunction;

use crate::function_registry::FunctionRegistry;

pub(crate) struct SystemFunction;

impl SystemFunction {
    pub fn register(registry: &FunctionRegistry) {
        registry.register_scalar(BuildFunction);
        registry.register_scalar(VersionFunction);
        registry.register_scalar(CurrentSchemaFunction);
        registry.register_scalar(DatabaseFunction);
        registry.register_scalar(SessionUserFunction);
        registry.register_scalar(ReadPreferenceFunction);
        registry.register_scalar(PgBackendPidFunction);
        registry.register_scalar(ConnectionIdFunction);
        registry.register_scalar(TimezoneFunction);
        registry.register(ProcedureStateFunction::factory());
        PGCatalogFunction::register(registry);
    }
}
